Originally posted by clackers I've not had any trouble focusing in the dark, Lars.
You can't just point at the groom's black suit.
PDAF system of any camera relies on seeing a distinct line on the target.
You should focus on, say, the edge of his collar.
K1 focusing at dim light is very acurate.. BUT.. takes time to lock focus.. I wish that the camera could trigger the AF assit lamp faster to help focus faster, especially at weddings..
Besides that, the camera performs great, buffer fills fast as somebody else told you so be aware of that if you trigger to many frames. 24-70 is an awsome lens, sharp and versatile, Tamron 70 200 is also an awsome lens ( kind of loud ) but very fast for a screw drive lens, 100mm macro will do some nice details of the rings, etc...
Good luck with your wedding